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Title: An examination of abnormal grain growth in low strain nickel-200

Abstract

Here, this study offers experimental observation of the effect of low strain conditions (ε < 10%) on abnormal grain growth (AGG) in Nickel-200. At such conditions, stored mechanical energy is low within the microstructure enabling one to observe the impact of increasing mechanical deformation on the early onset of AGG compared to a control, or nondeformed, equivalent sample. The onset of AGG was observed to occur at specific pairings of compressive strain and annealing temperature and an empirical relation describing the influence of thermal exposure and strain content was developed. The evolution of low-Σ coincident site lattice (CSL) boundaries and overall grain size distributions are quantified using electron backscatter diffraction preceding, at onset and during ensuing AGG, whereby possible mechanisms for AGG in the low strain regime are offered and discussed.

Authors:
 [1];  [1];  [2];  [2];  [3];  [3]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. The Univ. of Alabama, Tuscaloosa, AL (United States)
  3. Univ. of Alabama in Huntsville, Huntsville, AL (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1259673
Report Number(s):
SAND-2016-2459J
Journal ID: ISSN 2192-9262; PII: 290
Grant/Contract Number:
AC04-94AL85000
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Metallography, Microstructure and Analysis
Additional Journal Information:
Journal Name: Metallography, Microstructure and Analysis; Journal ID: ISSN 2192-9262
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; nickel; abnormal grain growth; low strain; electron backscattered diffraction

Citation Formats

Underwood, O., Madison, J., Martens, R. M., Thompson, G. B., Welsh, S., and Evans, J. An examination of abnormal grain growth in low strain nickel-200. United States: N. p., 2016. Web. doi:10.1007/s13632-016-0290-0.
Underwood, O., Madison, J., Martens, R. M., Thompson, G. B., Welsh, S., & Evans, J. An examination of abnormal grain growth in low strain nickel-200. United States. doi:10.1007/s13632-016-0290-0.
Underwood, O., Madison, J., Martens, R. M., Thompson, G. B., Welsh, S., and Evans, J. 2016. "An examination of abnormal grain growth in low strain nickel-200". United States. doi:10.1007/s13632-016-0290-0. https://www.osti.gov/servlets/purl/1259673.
@article{osti_1259673,
title = {An examination of abnormal grain growth in low strain nickel-200},
author = {Underwood, O. and Madison, J. and Martens, R. M. and Thompson, G. B. and Welsh, S. and Evans, J.},
abstractNote = {Here, this study offers experimental observation of the effect of low strain conditions (ε < 10%) on abnormal grain growth (AGG) in Nickel-200. At such conditions, stored mechanical energy is low within the microstructure enabling one to observe the impact of increasing mechanical deformation on the early onset of AGG compared to a control, or nondeformed, equivalent sample. The onset of AGG was observed to occur at specific pairings of compressive strain and annealing temperature and an empirical relation describing the influence of thermal exposure and strain content was developed. The evolution of low-Σ coincident site lattice (CSL) boundaries and overall grain size distributions are quantified using electron backscatter diffraction preceding, at onset and during ensuing AGG, whereby possible mechanisms for AGG in the low strain regime are offered and discussed.},
doi = {10.1007/s13632-016-0290-0},
journal = {Metallography, Microstructure and Analysis},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 6
}

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